package com.hmdp.service.impl;

import cn.hutool.core.bean.BeanUtil;
import cn.hutool.core.bean.copier.CopyOptions;
import cn.hutool.core.lang.UUID;
import cn.hutool.core.util.RandomUtil;
import cn.hutool.crypto.digest.BCrypt;
import cn.hutool.json.JSONUtil;
import com.baomidou.mybatisplus.core.toolkit.StringUtils;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.hmdp.dto.LoginFormDTO;
import com.hmdp.dto.Result;
import com.hmdp.dto.UserDTO;
import com.hmdp.entity.User;
import com.hmdp.mapper.UserMapper;
import com.hmdp.service.IUserService;
import com.hmdp.utils.JwtTokenUtil;
import com.hmdp.utils.RegexUtils;
import com.hmdp.utils.UserHolder;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.connection.BitFieldSubCommands;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Service;

import javax.annotation.Resource;
import javax.servlet.http.HttpSession;

import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;
import java.util.*;
import java.util.concurrent.TimeUnit;

import static com.hmdp.utils.RedisConstants.*;
import static com.hmdp.utils.SystemConstants.USER_NICK_NAME_PREFIX;

/**
 * <p>
 * 服务实现类
 * </p>
 *
 * @author 王坤峰
 * @since 2021-12-22
 */
@Service
@Slf4j
public class UserServiceImpl extends ServiceImpl<UserMapper, User> implements IUserService {

    @Resource
    private StringRedisTemplate stringRedisTemplate;

    @Autowired
    JwtTokenUtil tokenUtil;
    @Autowired
    private UserInfoServiceImpl userInfoServiceImpl;

    @Resource
    private UserMapper userMapper;

    @Override
    public Result sendCode(String phone, HttpSession session) {
        //1,校验手机号
        if (RegexUtils.isPhoneInvalid(phone)) {
            //2,如果不符合，返回错误信息
            return Result.fail("手机号格式错误");
        }
        //3符合，生成验证码
        String code = RandomUtil.randomNumbers(6);

        //4,保存验证码到Session
        stringRedisTemplate.opsForValue().set(LOGIN_CODE_KEY + phone, code, LOGIN_CODE_TTL, TimeUnit.MINUTES);
        //5,发送验证码
        log.debug("发送短信验证码成功,验证码: {}",code);
        //返回ok
        return Result.ok();
    }

    @Override
    public Result login(LoginFormDTO loginForm, HttpSession session) {
        //1,校验手机号
        String phone = loginForm.getPhone();
        if (RegexUtils.isPhoneInvalid(phone)) {
            //2,如果不符合，返回错误信息
            return Result.fail("手机号格式错误");
        }
        //3,校验验证码
        String cacheCode = stringRedisTemplate.opsForValue().get(LOGIN_CODE_KEY + phone);
//        Object cacheCode = session.getAttribute("code");
        //查询密码
        String userpassword = userMapper.getPassword(phone);
        String code = loginForm.getCode();
        String password = loginForm.getPassword();
        boolean correctPassword = false;
        boolean correctCode = false;
        if (userpassword != null && password != null) {
            correctPassword = userpassword.equals(password); //1
        }
        if(cacheCode != null &&code != null ){
            correctCode = !StringUtils.isEmpty(cacheCode) && cacheCode.equals(code); //0
        }
        // 如果验证码或密码有一个正确，允许登录
        if (!correctCode && !correctPassword) {
            return Result.fail("验证码或密码错误");
        }

        //一致，根据手机号查询用户
        User user = query().eq("phone", phone).one();
        //5,判断用户是否存在
        if (user == null){
            //不存在，则创建
            user = createUserWithPhone(phone);
        }

/*        //7.保存用户信息到redis 中
        //7.1随机生成token，作为登录令牌
        String token = UUID.randomUUID().toString();
        //7.2将User对象转换为HashMap存储
        UserDTO userDTO = BeanUtil.copyProperties(user, UserDTO.class);
        Map<String, Object> userMap = BeanUtil.beanToMap(userDTO, new HashMap<>(),
                CopyOptions.create()
                        .setIgnoreNullValue(true)
                        .setFieldValueEditor((fieldName, fieldValue) ->
                                fieldValue.toString()));
        //7.3存储
        String tokenKey = LOGIN_USER_KEY + token;
        stringRedisTemplate.opsForHash().putAll(tokenKey,userMap);
        //7.4设置token有效期
        stringRedisTemplate.expire(tokenKey,LOGIN_USER_TTL, TimeUnit.MINUTES);*/

        //升级成jwt
        //1,拼接token负载
        UserDTO userDTO = BeanUtil.copyProperties(user, UserDTO.class);
        String token = tokenUtil.generateToken(userDTO);
        //uv统计
        stringRedisTemplate.opsForHyperLogLog().add(LOGIN_USER_KEY,user.getId().toString());
        //8返回token
        return Result.ok(token);

/*        //7,保存到session中
//        session.setAttribute("user",user);
        session.setAttribute("user",BeanUtil.copyProperties(user,UserDTO.class));
        return Result.ok();*/

    }
    @Override
    public Result sign() {
        // 1.获取当前登录用户
        Long userId = UserHolder.getUser().getId();
        // 2.获取日期
        LocalDateTime now = LocalDateTime.now();
        // 3.拼接key
        String keySuffix = now.format(DateTimeFormatter.ofPattern(":yyyyMM"));
        String key = USER_SIGN_KEY + userId + keySuffix;
        // 4.获取今天是本月的第几天
        int dayOfMonth = now.getDayOfMonth();
        // 5.写入Redis SETBIT key offset 1
        stringRedisTemplate.opsForValue().setBit(key, dayOfMonth - 1, true);//这里是从0开始的，这里的true表示签到了
        return Result.ok();
    }

    @Override
    public Result signCount() {
        // 1.获取当前登录用户
        Long userId = UserHolder.getUser().getId();
        // 2.获取日期
        LocalDateTime now = LocalDateTime.now();
        // 3.拼接key
        String keySuffix = now.format(DateTimeFormatter.ofPattern(":yyyyMM"));
        String key = USER_SIGN_KEY + userId + keySuffix;
        // 4.获取今天是本月的第几天
        int dayOfMonth = now.getDayOfMonth();
        // 5.获取本月截止今天为止的所有的签到记录，返回的是一个十进制的数字 BITFIELD sign:5:202203 GET u14 0
        List<Long> result = stringRedisTemplate.opsForValue().bitField(
                key,
                BitFieldSubCommands.create()
                        .get(BitFieldSubCommands.BitFieldType.unsigned(dayOfMonth)).valueAt(0)
        );
        if (result == null || result.isEmpty()) {
            // 没有任何签到结果
            return Result.ok(0);
        }
        Long num = result.get(0);
        if (num == null || num == 0) {
            return Result.ok(0);
        }
        // 6.循环遍历
        int count = 0;
        while (true) {
            // 6.1.让这个数字与1做与运算，得到数字的最后一个bit位  // 判断这个bit位是否为0
            if ((num & 1) == 0) {
                // 如果为0，说明未签到，结束
                break;
            }else {
                // 如果不为0，说明已签到，计数器+1
                count++;
            }
            // 把数字右移一位，抛弃最后一个bit位，继续下一个bit位
            num >>>= 1;
        }
        return Result.ok(count);
    }

    @Override
    public Result logout() {
       if (UserHolder.getUser()!=null){
           UserHolder.removeUser();
       }
        return Result.ok();
    }

    @Override
    public Result changeName(String nickName) {
        UserDTO user = UserHolder.getUser();
        Long id = user.getId();
        User user1 = query().eq("id", id).one();
        user1.setNickName(nickName);
        updateById(user1);
        UserHolder.updateNickname(nickName);
        log.info("修改成功"+UserHolder.getUser());
        String key = "user:"+id;
        stringRedisTemplate.delete(key);
        return Result.ok(user1);
    }

    @Override
    public Result getMe() {
        //User user = userService.getById(id);
//        UserDTO userDTO = BeanUtil.copyProperties(user, UserDTO.class);
        UserDTO userdto = UserHolder.getUser();
        Long userId = userdto.getId();
        String key = "user:"+userId;
        String cache = stringRedisTemplate.opsForValue().get(key);
        User user = null;
        if (cache!=null){
            user = JSONUtil.toBean(cache, User.class);
        }else {
            // 查询详情
            user = this.getById(userId);
            if (user == null) {
                // 没有详情，应该是第一次查看详情
                return Result.ok();
            }
            stringRedisTemplate.opsForValue().set(key, JSONUtil.toJsonStr(user));
            UserHolder.removeUser();

        }
        // 返回
        UserDTO userDTO = BeanUtil.copyProperties(user, UserDTO.class);
        UserHolder.saveUser(userdto);
        return Result.ok(userDTO);
    }


    private User createUserWithPhone(String phone) {
        //1,创建用户
        User user = new User();
        user.setIsShop(0);
        user.setPhone(phone);
        user.setNickName(USER_NICK_NAME_PREFIX + RandomUtil.randomString(10));
        //2,保存用户
        save(user);
        return user;
    }
}
